NOTE: As of 6/25/2008 it appears that this api is no longer available.
From their site: AIM Phoneline is more than just a product it's a platform with a large AIM user base (43 million active users). AOL invites you to leverage this platform by developing and integrating your own products and services. AOL has created a series of APIs to help you innovate with AIM Phoneline: The Open AIM Phoneline initiative provides several interfaces facilitating the integration of partner services into the AIM Phoneline experience: Ringback Tone APIs, Auto Action APIs, Screen Name Service (SNS) API. You bring your product, service, application, or enhancement to the table, and we will give you the hooks to “plug in” to AIM Phoneline. You manage the relationship with your customers (registration, provisioning, billing and customer care) and we will work with you to promote your offer via our storefront.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.